1895.] 



MICROSCOPICAL JOURNAL. 



51 



presence of common mould in the core which gains en- 

 trance through an open pip. Ordinarily only apples 

 with open pips are liable to the disease. The spores of 

 common mould coming in contact with the surface of an 

 apple with an open pip first adhere, then germinate and 

 send their threads into the pip-hole and thence into the 

 core cavity. Here the threads grow and fructify until 



Cells from white growth on seeds of an apple. 



m. A thick part of the mount. 



they finally attack the pulp which attack is accompanied 

 by a brownish rot." 



I examined some 300 out of a lot of three barrels of 

 rather imperfect apples and made notes of the results. 

 Apples of the same variety vary greatly as to the condi- 

 tion of the pip or blossom end — both while growing and 



